Referring to my previous question someone answered that employee will be deducted 13.7 % from the net pay. How did you find /calculate 13.7 % less. where did you get this percentage?

(Question: Your organization, located in Manitoba, will be enhancing the group benefits plan offered to employees in two months by adding accidental death and dismemberment (AD&D) coverage and vision care coverage. The organization will pay 50% of the cost of the AD&D premiums and 50% of the cost of the vision care premiums, with the employees paying the other 50% of each premium. The Manager of Finance, Cheryl Hunt, has requested that you, as the Payroll Supervisor, prepare a communication for the employees, explaining how these new benefits will impact their net pay. regarding